---
title: Vendor Consent
lastModified: "2026-10-07T18:56:41+01:00"
lastAuthor: Kaylee
---
```ts title="src/vendor-consent.ts"
import { isVendorAllowed } from 'c15t';
import type { SaveResult, Vendor } from 'c15t';
import type { ConsentRuntime } from 'c15t/runtime';

export const vendors: Vendor[] = [
	{
		category: 'marketing',
		id: 'x-pixel',
		name: 'X Pixel',
		privacyPolicyUrl: 'https://x.com/privacy',
	},
];

// Whether the vendor may run now: it is declared, its category is allowed
// and the visitor has not switched it off. An undeclared id returns false.
export const canVendorRun = function canVendorRun(
	runtime: ConsentRuntime,
	vendorId: string
): boolean {
	return isVendorAllowed(runtime.kernel.getSnapshot(), vendorId);
};

// Record one vendor switch. The empty category input confirms no category;
// `save()` with no input would also confirm every displayed category.
export const saveVendorSwitch = function saveVendorSwitch(
	runtime: ConsentRuntime,
	vendorId: string,
	granted: boolean
): Promise<SaveResult> {
	return runtime.kernel.commands.save({}, { vendors: { [vendorId]: granted } });
};
```